This exercise will be to spend one or two weeks observing everything you are doing, trying to do as little as possible that is purely self serving and do as much as possible in serving other people for the sake of serving. Although you may prefer to serve animals instead of humans, it is important to make this exercise a service to humans. Do things not because you will get credit, not because people will think what a wonderful person you are, but do things anonymously. If you serve at the soup kitchen for the homeless as an example, do not give out your full name, do not say anything about yourself so that no one can give you credit. Do not tell anyone, friends, family, what you have done so that you cannot attain any credit whatsoever for your acts. You will observe how much your ego wants to do good things only if you can get credit for them, which would be self serving. This is the EXERCISE of attaining liberation through being of selfless service to others. Giving to gain credit or acknowledgment is not pure, true giving and will not bring the highest benefits.
ALL THE BEST